[Feature] add GA346 baseline version

Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/Documentation/sound/kernel-api/index.rst b/src/kernel/linux/v4.19/Documentation/sound/kernel-api/index.rst
new file mode 100644
index 0000000..d0e6df3
--- /dev/null
+++ b/src/kernel/linux/v4.19/Documentation/sound/kernel-api/index.rst
@@ -0,0 +1,8 @@
+ALSA Kernel API Documentation
+=============================
+
+.. toctree::
+   :maxdepth: 2
+
+   alsa-driver-api
+   writing-an-alsa-driver